where P is the lithospheric pressure (in MPa) in a middle layer in the measured bodies and \(a_3\)  and \(b_3\)  are constants. We used the approximate value of \(a_3 = 0.5\)  and \(b_3 = -0.2\)  [1]}. With these calculations, the porosity values are between 13 and 34% in the examined size range for the 42:58 rock/water ratio specified earlier (see Fig. REF )
